Hi everyone,
I've just launched my (new) data-driven subscription newsletter for self-published authors on Amazon, and it's called Kindletrends:
This is a pretty niche product, but the people who need it, really need it, and there ain't nothing much out there like it. I've been running a beta test for the last month or so, and getting some good feedback - plus, five paid signups already, meaning that I'm (just) profitable, which is a nice feeling.
For newsletter creators, I think the interesting angle here is that this is 100% data-driven - I am scraping information from the Kindle Store, doing some stats and NLP (text analysis) on it, then formatting that into an email and providing links to relevant things for download/further investigation. I think this idea of 'newsletter as automated data processing' is a pretty interesting one, and I'm keen to pursue it in other areas.
Any questions, or if you'd like to know about the tech, I'm happy to talk.